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Copy pathleetcode830.java
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44 lines (40 loc) · 1.12 KB
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package leetcode;
import java.util.ArrayList;
import java.util.List;
public class leetcode830 {
List<List<Integer>> list=new ArrayList<>();
public List<List<Integer>> largeGroupPositions(String S) {
char [] chars=S.toCharArray();
char cur=chars[0];
int start=0;
int end=0;
int num=1;
for (int i = 1; i <chars.length ; i++) {
if (chars[i]==cur){
end++;
num++;
}else {
if (num>=3){
List<Integer> temp=new ArrayList<>();
temp.add(start);
temp.add(end);
list.add(temp);
}
cur=chars[i]; //改变此时的字符值
end++;
start=end;
num=1;
}
}
if (num>=3){
List<Integer> temp=new ArrayList<>();
temp.add(start);
temp.add(end);
list.add(temp);
}
return list;
}
public static void main(String[] args) {
new leetcode830().largeGroupPositions("aaa");
}
}